Short Description:
1. Play Music
2. Help Miku dance & lipsync
example: youtu.be/1szQ7YDGdXw

Long Description:
"Halfne Miku Studio" is a very basic dancing program with the goal of allowing you to entertain yourself as you listen to music and pretend Miku is singing and dancing to it, because either you can't find any videos of it, or you don't know how to make them yourself (but you at least know how to wave a mouse to a beat and tap a space bar to some notes!).

Hopefully I don't have to explain much, but I will probably have to. I'll wait a bit to see what issues I most often hear people coming across, and then editing the answer back in to a FAQ.
Until then, click on buttons and see what they do!

I spent most of this month working on this thing. My plans for this deviation kind of blew out of proportion: originally it was just going to be an illustration of a tiny Miku with no arms. Then it was going to be an animation. Then, when I had the animation set up, I was like "hey, why not take it a step further and make it controllable by input as well?" And then I had to add lip syncing and backgrounds. And then I was about ready to upload it when I thought "Hey, I want to record a clip of how this is supposed to be used so people can understand its purpose without having to read!" But it turns out I really suck at live performances, so I made implemented a crude recording and playback feature. And then I thought, "well, as long as I made this interface, I should probably try to make it a little more accessible to people." And so now you have it: the product of a month of feature creep! Was it worth it? I DON'T KNOW! *_*

I originally called her "Halfne" because she was so small and armless that it was like she was not a complete Miku. I'm sticking with it for now, even after attaching her arms, because she has no voice and that might kind of be a big deal for a vocaloid?

Frequently Asked Questions
Q: Can I upload this to Youtube?
A: Sure! You don't even need to credit me; just be cool about it.

Q: How do I upload this to Youtube?
A: You'll need to record the screen with something like Fraps or CamStudio. The saved .jig files are just for resuming/sharing your work in Halfne Miku Studio.

Q: Will there be different outfits/characters to choose from?
A: Not in this version, no. This is more of a proof of concept, and I need to end the feature creep somewhere.
HINT: I might want to make another version based on the feedback I get here? I want to see how well this idea is received before I sink more time into it.

Q: How did you make this?
A: Uhhh, with my computer? I don't know what kind of answer you are hoping for.

Q: Can I change the lipsync after I've recorded it?
A: Yup. Mouse over the entry in the studio timeline and then press the key that corresponds to the mouth shape you want, and it will change.

Q: Can I erase recorded mouse movements?
A: Now you can! Just mouse over the section in the timeline and press Delete/Backspace, like you would for the other cues.

Q: How did you make that (motion)?
A: There's a lot of matrix manipulation and math going on, but here's the gist of it: I have all of Miku's body parts as separate movieclips, and at initialization I run some of them through a function where I register part A to part B (and optionally, part C, for pieces that need to bridge two points like how the arms and legs do). Then in the update loop, I make some translations & rotations with math and apply them to some of the more independent pieces (like the head) and then iterate through the parts again and maintain the connections that were set up in the beginning. Some of the unconstrained pieces like the hair and necktie are set up with a rudimentary "ball on string" physics where I then rotate and stretch the pieces to connect to the imaginary mass.

Q: How do I download this?
A: There is a download button to the right on this page. Swf files can be opened in browsers or swf players.

Made in Flash
Hatsune Miku / VOCALOID © Crypton Future Media / Yamaha Corporation

Also, these are too cool to not share:
youtu.be/sSwzu1hFllc
youtu.be/v4Pqt1fPWUw

EDIT: Do you want to add your own characters/features/support? I've open-sourced the studio on GitHub here! github.com/Bietol/HalfneMiku